How to check the operation of the fuel pump?

To check the fuel pump, sit in the vehicle with windows closed and turn ignition key to ON. Listen for pump sound as it pressurizes fuel system. If no sound, remove fuel filler cap and have assistant turn ignition switch to ON while you listen. Check fuse, relay, wiring, and replace pump if necessary. Connect fuel pressure gauge to test port on fuel feed line and start engine. Compare gauge reading to specifications. If pressure is low, check filter, lines, and hoses for issues. Replace fuel pump module if regulator is stuck open.

How to remove the fuel pump/fuel level sending unit module on Chevrolet Avalanche,Silverado,Suburban,Tahoe,GMC Sierra,Yukon,Yukon Denali and Yukon XL?

At first, disconnect the cable from the negative side of the battery and release the pressure in the fuel system so that you can remove the fuel pump/fuel level sensor. Remove the fuel tank, then disconnect both evaporative (EVAP) vent line and fuel tank vent line fitting as well as two quick-connect fittings on the fuel supply line from the mounting flange of the fuel pump/fuel level sensor. With water pump pliers, rotate off a lock ring of a fuel pump/fuel level sensor using care not to damage a float arm and a float of a fuel level. After checking o-ring it may be necessary to replace one before installing a new pump. During installation, align these marks made on this flange with those on a tank and carefully put down this flange into their seats where my float arm or even floats will neither be harmed nor damaged when they are placed until they reach there at all.

How to replace and install the fuel pump/fuel level sending unit on Chevrolet Avalanche,Silverado,Suburban,Tahoe,GMC Sierra,Yukon,Yukon Denali and Yukon XL?

Place the removed fuel pump/fuel level sensor on a clean surface. Disconnect the sensor's electrical connector and wiring harness. Remove the fuel level sensor from the pump module. If any component is defective, replace the entire module. To reinstall, slide the sensor into place until it clicks and verify its position. Follow the removal steps in reverse for installation.

Genuine Chevrolet Silverado Fuel Pump

Gas Pump

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88 Fuel Pumps found

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Chevrolet Silverado MODULE KIT,F/TNK F/PMP
Part Number: 19369915
$197.13 MSRP: $414.14
You Save: $217.01 (53%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Fuel Pump, Module
- Replaces: 19331263, 25345026, 25176865, 19121626, 19153711
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2003 Chevrolet Silverado | 1500 CREW CAB LONG BOX, 1500 EXTENDED CAB LONG BOX, 1500 EXTENDED CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, 2500 CREW CAB LONG BOX, 2500 CREW CAB STANDARD BOX, 2500 EXTENDED CAB LONG BOX, 2500 EXTENDED CAB STANDARD BOX, 2500 REGULAR CAB, 3500 CREW CAB, 3500 EXTENDED CAB, 3500 REGULAR CAB | 6 Cyl 4.3L, 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L, 8 Cyl 8.1L
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Chevrolet Silverado Fuel Tank Fuel Pump Module Kit (W/O Fuel Level Sensor)
Part Number: 13513408
$189.54 MSRP: $543.71
You Save: $354.17 (66%)
ADD TO CART
Product Specifications
- Other Name: Module Kit, Fuel Tank Fuel Pump (W/O Fuel Level Se; Fuel Pump
- Replaces: 13582487
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2018 Chevrolet Silverado | 1500 REGULAR CAB STANDARD BOX | 6 Cyl 4.3L, 8 Cyl 5.3L
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Chevrolet Silverado Fuel Tank Fuel Pump Module Kit
Part Number: 19331950
$399.54 MSRP: $839.36
You Save: $439.82 (53%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Module Kit,Fuel Tank Fuel Pump
- Replaces: 19133480, 19152214, 19303389
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Chevrolet Silverado | 1500 CREW CAB STANDARD BOX, 1500 EXTENDED CAB SHORT BOX, CLASSIC 1500 CREW CAB STANDARD BOX, CLASSIC 1500 EXTENDED CAB SHORT BOX | 6 Cyl 4.3L, 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 6.0L
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Chevrolet Silverado Fuel Tank Fuel Pump Module Kit (W/O Fuel Level Sensor)
Part Number: 84376555
$144.21 MSRP: $302.96
You Save: $158.75 (53%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Module Kit, Fuel Tank Fuel Pump (W/O Fuel Level Sensor); Fuel Pump
- Replaces: 84174279
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011-2019 Chevrolet Silverado | 3500 CREW CAB ONLY, 3500 REGULAR (CAB ONLY), 3500 REGULAR CAB, REGULAR CAB CHASSIS 1 TON 137.0, REGULAR CAB CHASSIS 1 TON 161.5 | 8 Cyl 6.0L Flex
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Chevrolet Silverado MODULE KIT,F/TNK F/PMP
Part Number: 19370022
$337.74 MSRP: $739.76
You Save: $402.02 (55%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: 19303425, 25350284, 19133491, 19332056
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Chevrolet Silverado | 3500 CHASSIS EXTENDED CAB 161.5, 3500 CHASSIS REGULAR CAB 137.0, 3500 CHASSIS REGULAR CAB 161.5, CLASSIC 3500 CHASSIS EXTENDED CAB 161.5, CLASSIC 3500 CHASSIS REGULAR CAB 137.0, CLASSIC 3500 CHASSIS REGULAR CAB 161.5 | 8 Cyl 6.0L, 8 Cyl 8.1L
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Chevrolet Silverado Fuel Tank Fuel Pump Module Kit
Part Number: 19331937
$271.44 MSRP: $778.68
You Save: $507.24 (66%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Module Kit,Fuel Tank Fuel Pump; Fuel Pump, Module
- Replaces: 19133450, 19303391, 19167468
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Chevrolet Silverado | 1500 CREW CAB LONG BOX, 1500 EXTENDED CAB STANDARD BOX, 1500 REGULAR CAB STANDARD BOX, 2500 CREW CAB STANDARD BOX, 2500 EXTENDED CAB STANDARD BOX, CLASSIC 1500 CREW CAB LONG BOX, CLASSIC 1500 EXTENDED CAB STANDARD BOX, CLASSIC 1500 REGULAR CAB STANDARD BOX, CLASSIC 2500 CREW CAB STANDARD BOX, CLASSIC 2500 EXTENDED CAB STANDARD BOX | 6 Cyl 4.3L, 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 6.0L, 8 Cyl 8.1L
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Chevrolet Silverado Fuel Tank Fuel Pump Module Kit
Part Number: 19331306
$321.53 MSRP: $675.48
You Save: $353.95 (53%)
ADD TO CART
Product Specifications
- Other Name: Module Kit,Fuel Tank Fuel Pump; Fuel Pump, Module
- Replaces: 19152169, 19303427, 25350791
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2008 Chevrolet Silverado | 2500 CREW CAB LONG BOX, 2500 CREW CAB STANDARD BOX, 2500 EXTENDED CAB LONG BOX, 2500 EXTENDED CAB STANDARD BOX, 2500 REGULAR CAB, 3500 CREW CAB, 3500 EXTENDED CAB, 3500 REGULAR CAB, CLASSIC 2500 CREW CAB LONG BOX, CLASSIC 2500 CREW CAB STANDARD BOX, CLASSIC 2500 EXTENDED CAB LONG BOX, CLASSIC 2500 EXTENDED CAB STANDARD BOX, CLASSIC 2500 REGULAR CAB, CLASSIC 3500 CREW CAB, CLASSIC 3500 EXTENDED CAB, CLASSIC 3500 REGULAR CAB, CREW CAB 1 TON, CREW CAB 6'6" BOX 3/4 TON, CREW CAB 8' BOX 3/4 TON, EXTENDED CAB 1 TON, EXTENDED CAB 6'6" BOX 3/4 TON, EXTENDED CAB 8' BOX 3/4 TON, REGULAR CAB 1 TON, REGULAR CAB 3/4 TON | 8 Cyl 6.6L Diesel
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Chevrolet Silverado Fuel Tank Fuel Pump Module Kit (W/O Fuel Level Se
Part Number: 13578389
$273.37 MSRP: $515.80
You Save: $242.43 (47%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Module Kit, Fuel Tank Fuel Pump (W/O Fuel Level Se; Fuel Pump
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011-2016 Chevrolet Silverado | 2500 CREW CAB STANDARD BOX, 3500 CREW CAB STANDARD BOX, CREW CAB 6'6" BOX 3/4 TON, DOUBLE CAB 2500 STANDARD BOX, EXTENDED CAB 6'6" BOX 3/4 TON | 8 Cyl 6.6L Diesel
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Chevrolet Silverado Fuel Tank Fuel Pump Module Kit
Part Number: 19331960
$401.89 MSRP: $844.31
You Save: $442.42 (53%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Module Kit,Fuel Tank Fuel Pump
- Replaces: 19167467, 19133449, 19303385, 88965371
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Chevrolet Silverado | 1500 CREW CAB LONG BOX, 1500 EXTENDED CAB STANDARD BOX, 1500 REGULAR CAB STANDARD BOX, 2500 CREW CAB STANDARD BOX, 2500 EXTENDED CAB STANDARD BOX, CLASSIC 1500 CREW CAB LONG BOX, CLASSIC 1500 EXTENDED CAB STANDARD BOX, CLASSIC 1500 REGULAR CAB STANDARD BOX, CLASSIC 2500 CREW CAB STANDARD BOX, CLASSIC 2500 EXTENDED CAB STANDARD BOX | 6 Cyl 4.3L, 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 6.0L, 8 Cyl 8.1L
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Chevrolet Silverado Fuel Tank Fuel Pump Module Kit (W/O Fuel Level Se
Part Number: 13578388
$211.37 MSRP: $515.80
You Save: $304.43 (60%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Module Kit, Fuel Tank Fuel Pump (W/O Fuel Level Se; Fuel Pump
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011-2016 Chevrolet Silverado | 2500 REGULAR CAB, 3500 CREW CAB LONG BOX, 3500 DOUBLE CAB LONG BOX, 3500 REGULAR CAB, CREW CAB 1 TON, CREW CAB 2500 LONG BOX, CREW CAB 8' BOX 3/4 TON, DOUBLE CAB 2500 LONG BOX, EXTENDED CAB 1 TON, EXTENDED CAB 8' BOX 3/4 TON, REGULAR CAB 1 TON, REGULAR CAB 3/4 TON | 8 Cyl 6.6L Diesel
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Chevrolet Silverado Fuel Tank Fuel Pump Module Kit
Part Number: 19332060
$434.27 MSRP: $912.34
You Save: $478.07 (53%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Module Kit,Fuel Tank Fuel Pump
- Replaces: 19167491, 19303401, 19133461
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Chevrolet Silverado | 3500 CHASSIS EXTENDED CAB 161.5, 3500 CHASSIS REGULAR CAB 137.0, 3500 CHASSIS REGULAR CAB 161.5, CLASSIC 3500 CHASSIS EXTENDED CAB 161.5, CLASSIC 3500 CHASSIS REGULAR CAB 137.0, CLASSIC 3500 CHASSIS REGULAR CAB 161.5 | 8 Cyl 6.0L, 8 Cyl 8.1L
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Chevrolet Silverado Fuel Tank Fuel Pump Module Kit (W/O Fuel Level Sensor)
Part Number: 19206540
$296.45 MSRP: $622.82
You Save: $326.37 (53%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Module Kit,Fuel Tank Fuel Pump (W/O Fuel Level Sensor); Fuel Pump
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2010 Chevrolet Silverado | CREW CAB 1 TON, CREW CAB 6'6" BOX 3/4 TON, CREW CAB 8' BOX 3/4 TON, EXTENDED CAB 1 TON, EXTENDED CAB 6'6" BOX 3/4 TON, EXTENDED CAB 8' BOX 3/4 TON, REGULAR CAB 1 TON, REGULAR CAB 3/4 TON | 8 Cyl 6.6L Diesel
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Chevrolet Silverado PUMP ASM,FUEL
Part Number: 12719144
$126.18 MSRP: $265.08
You Save: $138.90 (53%)
ADD TO CART
Product Specifications
- Other Name: Fuel Pump
- Replaced by: 12733320
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2021-2024 Chevrolet Silverado | CREW CAB 5'8" BOX 1/2 TON, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 5.3L, 8 Cyl 6.2L
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Chevrolet Silverado Fuel Tank Fuel Pump Module KIT (W/O Fuel Lvl Sen)
Part Number: 19370398
$300.83 MSRP: $631.99
You Save: $331.16 (53%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Module Kit,F/Tnk F/Pmp (W/O Fuel Lvl Sen); Fuel Pump
- Replaces: 19168097, 19206532
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2008 Chevrolet Silverado | CREW CAB 1/2 TON, EXTENDED CAB 5'8" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON | 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 6.0L
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Chevrolet Silverado MODULE KIT
Part Number: 19369916
$229.36 MSRP: $481.85
You Save: $252.49 (53%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Fuel Pump, Module
- Replaces: 25314655, 25345028, 19121632, 19121627, 19153712, 19332082, 25315817
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2003 Chevrolet Silverado | 1500 EXTENDED CAB LONG BOX, 1500 EXTENDED CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, 2500 CREW CAB LONG BOX, 2500 CREW CAB STANDARD BOX, 2500 EXTENDED CAB LONG BOX, 2500 EXTENDED CAB STANDARD BOX, 2500 REGULAR CAB, 3500 CREW CAB, 3500 EXTENDED CAB, 3500 REGULAR CAB | 6 Cyl 4.3L, 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 6.0L, 8 Cyl 8.1L
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Chevrolet Silverado Fuel Tank Fuel Pump Module Kit
Part Number: 19331956
$303.71 MSRP: $638.04
You Save: $334.33 (53%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Module Kit,Fuel Tank Fuel Pump
- Replaces: 19133472, 19149559, 19303393, 19167480
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2007 Chevrolet Silverado | 1500 EXTENDED CAB STANDARD BOX, 1500 REGULAR CAB STANDARD BOX, CLASSIC 1500 EXTENDED CAB STANDARD BOX, CLASSIC 1500 REGULAR CAB STANDARD BOX | 8 Cyl 5.3L Flex
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Chevrolet Silverado Module Kit,Fuel Tank Fuel Pump (W/O Fuel Level Sensor)
Part Number: 19352890
$247.22 MSRP: $519.36
You Save: $272.14 (53%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: MODULE KIT,F/TNK F/PMP (W/O FUEL LVL SEN); Fuel Pump
- Replaces: 19133459, 19167477, 19303379, 88965434
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Chevrolet Silverado | 2500 CREW CAB LONG BOX, 2500 EXTENDED CAB LONG BOX, 2500 REGULAR CAB, 3500 CREW CAB, 3500 EXTENDED CAB, 3500 REGULAR CAB, CLASSIC 2500 CREW CAB LONG BOX, CLASSIC 2500 EXTENDED CAB LONG BOX, CLASSIC 2500 REGULAR CAB, CLASSIC 3500 CREW CAB, CLASSIC 3500 EXTENDED CAB, CLASSIC 3500 REGULAR CAB | 8 Cyl 6.0L, 8 Cyl 8.1L
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Chevrolet Silverado Fuel Tank Fuel Pump Module Kit
Part Number: 19331942
$307.10 MSRP: $645.18
You Save: $338.08 (53%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Module Kit,Fuel Tank Fuel Pump; Fuel Pump
- Replaces: 19133481, 19152213, 19303394
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Chevrolet Silverado | 1500 CREW CAB STANDARD BOX, 1500 EXTENDED CAB SHORT BOX, CLASSIC 1500 CREW CAB STANDARD BOX, CLASSIC 1500 EXTENDED CAB SHORT BOX | 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 6.0L
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Chevrolet Silverado Fuel Tank Fuel Pump Module Kit
Part Number: 19331940
$362.56 MSRP: $761.68
You Save: $399.12 (53%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Module Kit,Fuel Tank Fuel Pump; Fuel Pump
- Replaces: 19303392, 19167474, 19133456
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Chevrolet Silverado | 1500 EXTENDED CAB LONG BOX, 1500 REGULAR CAB LONG BOX, 2500 CREW CAB LONG BOX, 2500 EXTENDED CAB LONG BOX, 2500 REGULAR CAB, 3500 CREW CAB, 3500 EXTENDED CAB, 3500 REGULAR CAB, CLASSIC 1500 EXTENDED CAB LONG BOX, CLASSIC 1500 REGULAR CAB LONG BOX, CLASSIC 2500 CREW CAB LONG BOX, CLASSIC 2500 EXTENDED CAB LONG BOX, CLASSIC 2500 REGULAR CAB, CLASSIC 3500 CREW CAB, CLASSIC 3500 EXTENDED CAB, CLASSIC 3500 REGULAR CAB | 6 Cyl 4.3L, 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 6.0L, 8 Cyl 8.1L
View related parts
Chevrolet Silverado Fuel Tank Fuel Pump Module Kit (W/O Fuel Level Se
Part Number: 13589707
$329.19 MSRP: $593.11
You Save: $263.92 (45%)
Product Specifications
- Other Name: Module Kit, Fuel Tank Fuel Pump (W/O Fuel Level Se; Fuel Pump
- Replaces: 13581920, 13577632
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011-2014 Chevrolet Silverado | CREW CAB 6'6" BOX 3/4 TON, EXTENDED CAB 6'6" BOX 3/4 TON | 8 Cyl 6.0L, 8 Cyl 6.0L Flex

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Chevrolet Silverado Fuel Pump

Fuel Pump is one important component in Chevrolet Silverado in relation to its functionality involving the supply of fuel to the engine to support combustion. Heavily built, this component can degrade or run ineffectively over some time, or due to a modified engine. For carbureted engines, fuel pumps are low pressure mechanical while for fuel injected engines, high pressure electric fuel pumps are available in Silverado trucks. The positive attributes of the electric pumps which are installed within the tank include; they can generate more pressure, can be cooled by submerging them in fuel, and pose few fire risks. These pumps are managed by electronic control units that are used for controlling the fuel and safety measures for the proper functioning of the engine besides avoiding emissions.

Each OEM Chevrolet Silverado Fuel Pump we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.

Chevrolet Silverado Fuel Pump Parts Questions & Experts Answers

MODULE KIT,F/TNK F/PMP
19426299
Q: How to check the operation of the fuel pump?
A: To check the fuel pump, sit in the vehicle with windows closed and turn ignition key to ON. Listen for pump sound as it pressurizes fuel system. If no sound, remove fuel filler cap and have assistant turn ignition switch to ON while you listen. Check fuse, relay, wiring, and replace pump if necessary. Connect fuel pressure gauge to test port on fuel feed line and start engine. Compare gauge reading to specifications. If pressure is low, check filter, lines, and hoses for issues. Replace fuel pump module if regulator is stuck open.
Fuel Tank Fuel Pump Module Kit (W/O Fuel Level Sensor)
19257093
Q: How to remove the fuel pump/fuel level sending unit module on Chevrolet Avalanche,Silverado,Suburban,Tahoe,GMC Sierra,Yukon,Yukon Denali and Yukon XL?
A: At first, disconnect the cable from the negative side of the battery and release the pressure in the fuel system so that you can remove the fuel pump/fuel level sensor. Remove the fuel tank, then disconnect both evaporative (EVAP) vent line and fuel tank vent line fitting as well as two quick-connect fittings on the fuel supply line from the mounting flange of the fuel pump/fuel level sensor. With water pump pliers, rotate off a lock ring of a fuel pump/fuel level sensor using care not to damage a float arm and a float of a fuel level. After checking o-ring it may be necessary to replace one before installing a new pump. During installation, align these marks made on this flange with those on a tank and carefully put down this flange into their seats where my float arm or even floats will neither be harmed nor damaged when they are placed until they reach there at all.
Fuel Tank Fuel Pump Module Kit
19332060
Q: How to replace and install the fuel pump/fuel level sending unit on Chevrolet Avalanche,Silverado,Suburban,Tahoe,GMC Sierra,Yukon,Yukon Denali and Yukon XL?
A: Place the removed fuel pump/fuel level sensor on a clean surface. Disconnect the sensor's electrical connector and wiring harness. Remove the fuel level sensor from the pump module. If any component is defective, replace the entire module. To reinstall, slide the sensor into place until it clicks and verify its position. Follow the removal steps in reverse for installation.